-krantz



UNITED STATES HUBERT F. KRANTZ, OF BROOKLYN,

PATENT OFFICE.

NEW YORK, A'SSIGNOR TO KRANTZ MANUFACTUR- ING COMPANY, INC., OFBROOKLYN, NEW YORK, A CORPORATION 0F NEW YORK.

SWITCHBOABD.

Specification of Letters Patent.

Patented June 3, 1919.

Application led May 19, 1913. Serial No. 768,415.

new and useful Improvements in Switchboards, of which the following is aclear, full, and exact description.

This invention relates to an improved switchboard for electricalcircuits of the same generic construction as that shown in myapplication for United Stat-es Patent Scrial Number 651,565, filedSeptember 27th, 1911; that is, it comprises a board in which the switchcontacts may be made directly upon the bus bars intermediate the ends ofthe bus bars, whereby the use of cross bars may be eliminated.

One object of this invention is to so arrange the parts as to permit theribbon-like bands which constitute the bus bars to be placed on edge onthe back board to get a greater insulated air space between the barswith a less width of board between the bars.

A further object is to permit the, carrying of the branch circuitconnections, fuses and branch circuit side of the switch contacts on theside of the board away from the operator to make what may be called adead-face board, and at the same time to save vertical height of suchboard, which is a great desideratum in modern work.

In carrying out the first object. of the invention, to Wit: the carryingof the bus bars on edge, I generally run these bus bars vertically upand down the back of the board, one bus bar parallel to the next,although of course, they may be run horizontally if desired.

In carrying out the second object o" the invention, I generally mountthe branch circuit connections, fuses and switch terminal on supports orshelves in the rear of the back plate connected by suitable bracketswith the back plate, and these supports or shelves in my preferredconstruction are in a plane at right angles to the back board itself.The shelf support for fuses, branch circuit connections and switchcontacts may also carry the cables for the branch circuit connectionsbeneath the shelf. There may be any number of such shelves located oneabove the other on the back plate.

The switch may be mounted on switch brackets so that the two blades,where there 'may be pivoted arc two blades, may contact one with the busbar direct and one with the switch coni tact for the branch circuit, orthe switch may be mounted on either the bus bar or branch circuitcontact and swung in-and out of its circuit-closing position. ln eitherinstance the switch lover may be mounted on the face ol.' thc board anda connecting rod run through the board to operate the switch. Anysuitable type of switch or operating level', therefore, may be used,such as pull, push, quick-break or slow-break.

The scope of my invention will be pointed out in the claims.

ln the accompanying drawings. `wherein are shown one or more of variouspossible embodiments of the several features of the invention,

Figure 1 isthe section on the line 1-1, Fig. 4, of a portion oi' aswitclrboard constructed in accordance with this invention.

Fig. 2 is a. sectional view on the line 2-2, Fig. 4, showing anarrangement of one switch vertically above another.

Fig. 3 is a section on the line 3&3, Fig. 1.

Fig. ft is a rear elevation of a switchboard with four switches inplace.

Fig. 5 is a sectional view similar to Fig. 2. of a modified form ofswitch.

Referring now more particularly to Fig. 1 of the drawings.` there isshown at 1 a` back plate, generally of marble or slate, and at 2 asuitable number of brackets bolted to the back plate :i-nd carrying thesupporting shelves 3, preferably .of slate; the brackets 4 carry theshaft 5 for operating the switch blades 6, which are arranged in pairsand insulated from the shaft 5, as shown by Fig. 3, `by a collar ofinsulation 7.

The bus bars 8, 9, and 1() are secured, paral- 9 lel to each other, tothe back of the board by angle ln'ackets 11. It. will be noted that theyare 'fastened in place edgewisc, and as shown in Fig. 1, form thus amntact for the switches 6. The shaft 5 may be connected by a connectingrod 12 with the operating lever 13 pivoted at 14 to a bracket 15 at theface of the board, the rod 12 passing through an opening 1li in theboard.

As shown in Fig. 5, the switch blade 18 at 17 to a bus bar 8 in whichinstance the connecting rod 12 will be attached at a` point 20 to aninsulated block 21, mounted on the switch blade 18.

The supporting shelves 3 each carry in line with the bus bar or switchblade switch contacts 22 secured to the t'usc terminal 23, which in turnis joined by the fuse *24. with the fuse terminal 25 carried on thebranch circuit connection block 2U where the set screw 27, or similardevice, used to attach one end of a branch circuit wire 28 coming from abranch circuit cable 29. The branch circuit cables only be securedbeneath each supporting shelf and distributed from a central point suchas shown in Fig. 4 toward the ceiling of the switch board room and thusrun out in the conduits of the building. It will be apparent from theexamination of the dra wings that the only conductors of anydescriptionV which pass or cross the bus bars are the insulated branchcircuit cables and they pass the bus bars at a goodly distance away fromthe bus` bars on the supports. It will be noticed that cross bars areentirel)r donc away with by the simple device Of mounting thc switchterminals in line with the bus bars on a separate support and causingthe contact blade of the switch to operate on the bus bar and on thebranch circuit terminal Contact blade.

In carrying out this invention, details of construction may be variedfrom those shown, and yet the essence of the invention be retained; someparts might be employed.A

without others, and new features thereof might be combined with elementsold in the art in diverse ways, although the herein described type isregarded as embodying substantial improvements over such modifications.

As many changes could be made in the above construction, and manyapparently widely different embodiments of the invention could be madewithout departin from the scope thereof, it is intended that a l mattercontained in the above description or shown in the accompanying drawin sshall be interpreted in an illustrative an not in a limiting sense.

It is furthermore desired to be understood that the language used inlthe following claims is intended to cover all the generic and specificfeatures of the invention herein described, and all statements ofthescope of the invention which as a matter of language might be said tofall therebetween.

I claim as my invention:

1. Apparatus of the character described comprising, in combination, aninsulating support. busbars mounted directly thereon, brackets .securedat right angles to said insulating support. and extending beyond saidbus-bars, a second insulating support mounted on said brackets andVextending tra nsvcrscly to said busbars, branch-circuit terminalsmounted on said` last mentioned support, and a switch adapted to contactwith a bus-baraml a luanch-circuit terminal.

2. Apparatus of thc character described comprising, in combination, aninsulating support, bus-bars mounted on one face thereof, bracketssecured at right angles to said insulating support and extending beAvond said bus-bars, a second insulating support mounted on saidbrackets and extending transversely to said busbars, branch-circuitterminals mounted on the last mentioned support in aliuement,respectively, with said bus-bars, and a switch adapted to contact with abus-bar and a branchcircuit terminal.

3. Apparatus of the character described comprising, in combination, aninsulating support, bus-bars mounted directly thereon, brackets securedat right angles to said insulating support and extending beyond saidbus-bars, a second insulating sup ort mounted on said brackets andextending transversely to said bus-bars, branch circuits disposedbeneath said second insulating support, branclrcircuit terminals mountedon said second insulating support, and a switch adapted to con-tact witha bus-bar and a branch-circuit terminal.

4. In a switchboard, a base, an elongated conductor mounted upon andparallel to said base, a stationary contact mounted at the same side ofthe base at a distance from said elongated conductor and in a planeperpendicular to the base and coincident with the plane of theconductor, a switch member pivotally supported intermediate its ends foroperation in said plane to make electrical connection between theelongated conductor and the stationary contact, and a link-andlevermechanism mounted upon the base for actuating the said switch member.

5. A switchboard com rising a baseboard, a plurality of shelves isposedin parallel relation and spaced apart adjacent said baseboard, anelongated conductor extending transversely to said shelves between thesame and said baseboard, branch-line terminals mounted on said shelvesadjacent said conductor, and switch blades pivotally su portedintermediate their endsand movab e to effect engagement with saidconductor anl with corresponding branch-line termina s.

6. A switchboard combining a baseboard; a plurality of parallel stripsof insulating material spaced apart and disposed edgewise to saidbaseboard at a distance therefrom; a series of parallel bus-barsextending between said baseboard and said strips, transversely to thelatter; branch-line terminals mounted on said strips; and switch-bladespivoted at their center points to swing into positions to establishelectrical connections between their respective branch-line terminalsand said busbars.

7. A switchboard combining a baseboard; a plurality of parallel stripsof insulating material spaced apart adjacent to said baseboard; anelongated conductor extending 'transversely to said strips between thesame and said baseboard; branch-line terminals mounted atthe edge ofpaid Strips adjacent to said conductor; and a switch blade pivoted at apoint intermediate its ends to swing; into engagement with itsrespective branchline terminal and the conductor.

8. A switchboard combining a. baseboard; a narrow elongated strip ofinsulating 1naterial disposed adjacent to one face of said baseboard butspaced therefrom; a plurality of parallel conductors extending edgewisealongr the face of said baseboard between. the same and said strip; a,corresponding numbcr of branch-line terniinals, each arranged on saidstrip adjacent to its respective con# doctor; and a corresponding numberof switch blades pivotally mounted at points intermediate their ents soas to be movable into positions to make contactdirectly with saidconductor and its appropriate branchiinc terminal.

Si. A switchboard combining a baseboard; a plurality of parallel stripsof insulating material disposed adjacent to one face thereof; apylurality7 of narrow elongated bus-bars disposed in edgcwise relationto one tace of said hoard a nd extending transversely to said stripsbetween the same and Said board; a plurality ot' branclrlinc terminalscarried by said strippand a corresponding number of switches normallydisconnected from said terminals and' said bus-bars and adapted toconnect the samc together.

10. A switchboard combining a plurality of elongated strips ot'insulating material spaced apart in parallelism; `branch-line cablesextending along the rear face of each strip; branch-line tern'iinalscarried by the front face of each strip and connected, across the planethereof` to their appropriate branch-lino conductors; a main bus-bar cxtending transversely to said strips; and switches norn'iall)`disconncctral from said bus-bar and said branch-line terminals forengaging the same directly.

11. A switchboard combininga bascboard; a plurality of parallel, stripsof insulating material disposed at an angle to said base board; aplurality or' parallel bus-bars cx tending transversely to said stripsbetween the same and said baseboai'd; a plurality of brai'iclrlineterminals arranged adjacent to corresponding edges of said strips inproxiniity to said bus-bars; and switch bladcs `pivoted at pointsintermediate their ends to establish connections between said terminalsand said bns-bars.

1i). A switchboard combining a baselioard a plurality of parallel stripsof insulating material spaced apart adjacent to said bascboard; anelongated conductor extending transversely to said strips between thosame and said baseboard; branch-liml terminals mounted at the edges otsaid strips adjacent to said conductor; and a switch-blade pivoted at anintermediate point and adapted to swing to bring its onc cud intocontact with said conductor and its other yend into contact with itsrespective branch-line terminal.

13. A switch mechanism combining a con'imon carrier mounted to swingabout a center axis; a plurality of branch-line terminals arrangedalongside in a line equidistant from said axis; a series of parallelbusba'rs extending transversely to said axis and located on tlieoppositeside thereof; and a multiplicity oflblades mounted on said commoncarrier, each being adapted to establish electrical connection betweenits respective hns-bar and terminal.

14. A switchboard` consisting essentially of a vertical switchboardpancl having a dead front facc and a horizontal row of spacedtransvcrsiy holes, brackets at the front face of, and supported by, saidpanel, a front shaft below said holes and carried by said bracketsparallel with said i'ront face, upright switch-operating handles infront ot' said holes and mounted on said shaft. brackets at thc rearface of said panel, a rear shaft below said holcs and parallel with saidrear face and carried by said rear brackets, rockable switch blades inrear of said holes and mounted on said rear shaft, straight-bladerocking links extending through said holes and at their front endspivotally joined to said handles and at their rear ends pivotally joinedto said blades, stationary circuit-closer contacts at the rear face ot'said panel to cooperate with said blades, respectively, and electricalconnections and bus-bars for said blades and contacts and arranged atthe rear face of said panel.

l5. In a dcad-facc switchboard, comprising a wall of insulating materialhaving a transverse hole therethrough, a pair of pivot shafts disposedone at thc front of thewall and the other at the rear of the wall, bothbeing supported from said wall and being arranged substantially parallelto the respective faces of the wall and to each other, and aswitch-operating handle arricd by the front shaft, the combinationtherewith of a bus-bar supported upon the Wall at the rear side thereofand adapted to ari'yone side of an electric circuit, a contact memberalso at the rear side of thc wall spaced from the bus-bar and adaptedlto carry the opposito sido oll said electric circuit, a` swingingswitch blade ol conductive material carried by thc rear shaft andadapted to be swung to dispose onc of its ends for making electricalconnection with said contact member and for disposing its other cud tocomplete thc. electrical connection with the bus-bar, and mechanicalconnections extending from the switch blade through said wall intoengagement with the operating handle, whereby to swing the switch bladefrom the operating handle at will.

16. In a dcadface switchboard, comprising a wall of insulating materialhaving a series of transverse holes formed therethrough` a plurality ofpivot ysliafts dis-l posed some at the front of the wall and others atthe roar of the wall, all of said shafts being supported from said walland being arranged substantially parallel to the respective faces of thewall and toy cach other, and switchbperating handles carried by thefront shafts, the combination therewith of a busba1 supported upon thewall ati the rear side thereof, a plurality of branchline Contactmembers also at the rear side of said Wall and spaced from the busbar, ailurality of swinging switch blades of conductive material, at least onebeing associated with each hole in said series and each being,r adaptedto be swung to dispose one of its ends for makingjr electricalconnection with one of said branch-line contact members while disposingTits other end to complete the electric connection with the bus-bar, andmechanical Connections exv tending from said switch blades through saidholes into engagement with said open ating handles, whereby to swing theSWltch blades from said operating handles at will.

17. A switchboard comprising a base board, a strip of insulatin materialdis- Eosed adjacent one face o the baseboard ut spaced therefrom, a mainconductor extending along the face of said baseboard between the sameand said strip, a branchline terminal disposed on said stri adjacent thecorresponding conductor, and) a switch blade pivotally mounted at a ointintermediate its ends to engage direct y the branchline terminal and themain conductor.

18. In a switchboard, a base, a conductor mounted upon the said base, astationary contact member mounted at the same side of the base at adistance from said conductor and in a plane coincident with the plane ofthe conductor, a switch nlember pivotally supported intermediate itsends for op eration in said plane to make electrical connection betweenthe conductor and the oon tactl member, and a link-and-lever mechanismfor actuating the said switch` member.

Signed at Brooklyn, in the County of Kings. city and State of New Yorlc,this ib'th day of May. one thousand nine hundred and thirteen.

HUBERT F, KRANTZ. lVitincsses:

J. A. NEWTON, S. L. WTHITLDUK.

